How is the anonymous user of elastic used in kibana?

I created a anonymous user in elastic. If I request with curl a dashboard an Add -H 'Authorization: Basic', curl will return me the Dashboard's code. OK, I want link the dasboard in other application, I don't want the user make loging two times. I have x-pack. ¿ How Can share a Dashboard with anonymous user? I read de documentation but I didnt undertand nothing.

Thanks !!

@Oleg or @Brandon_Kobel can shed more light on this ...

Thanks
Rashmi